U.S. Navy Seaman Brian Teiken wears a joint service mask leakage detector canopy to test the seal integrity of his MCU-2P gas mask aboard the aircraft carrier USS Carl Vinson under way in the Pacific Ocean, Dec. 7, 2011. Teiken is an aviation support equipment technician airman apprentice. U.S. Navy Seaman Brian Teiken wears a joint service mask leakage detector canopy to test the seal integrity of his MCU-2P gas mask aboard the aircraft carrier USS Carl Vinson under way in the Pacific Ocean, Dec. 7, 2011. Teiken is an aviation support equipment technician airman apprentice. SHARE: Download: Full Size (2.71 MB) Tags: Photo Essays Credit: VIRIN: 446650-I-QDK82-254.jpg Photo Gallery